Method for preparing long fiber-reinforcing olefin polymer and long fiber

Patent metadata

Field	Value
Publication number	US-2018237560-A1
Application number	US-201615753570-A
Country	US
Kind code	A1
Filing date	Nov 30, 2016
Priority date	Dec 23, 2015
Publication date	Aug 23, 2018
Grant date	—

Abstract

The present invention provides a method for preparing an olefin polymer which can exhibit excellent isotacticity in a high yield and thus is suitable for use in reinforcing a long fiber, and a long fiber comprising an olefin polymer produced according to the above preparation method.

First claim

What is claimed is:

1 . A method for preparing a long fiber-reinforcing olefin polymer, the method comprising the steps of: polymerizing olefin monomers in the presence of a supported catalyst in which a transition metal compound represented by the following Chemical Formula 1, a cocatalyst represented by the following Chemical Formula 2, and a cocatalyst represented by the following Chemical Formula 3 are supported on a carrier.

in Chemical Formula 1,
M is one of a Group 3 transition metal, a Group 4 transition metal, a Group 5 transition metal, a lanthanide series transition metal, and an actinide series transition metal,
X 1 and X 2 are the same as or different from each other, and are each independently one of halogen,
A is one of Group 14 elements, n is an integer between 1 and 20,
R 1 is one of an alkyl having 1 to 20 carbon atoms, an alkenyl having 2 to 20 carbon atoms, an alkylaryl having 7 to 30 carbon atoms, an arylalkyl having 7 to 30 carbon atoms, and an aryl having 6 to 30 carbon atoms,
R 2 is one of hydrogen, an alkyl having 1 to 20 carbon atoms, an alkenyl having 2 to 20 carbon atoms, an alkylaryl having 7 to 30 carbon atoms, an arylalkyl having 7 to 30 carbon atoms, and an aryl having 6 to 30 carbon atoms, and
R 3 to R 6 are each independently one of an alkyl having 1 to 20 carbon atoms,
R 8 —[Al(R 7 )—O] m —R 9   [Chemical Formula 2]

in Chemical Formula 2,
R 7 , R 8 and R 9 are each independently one of hydrogen, halogen, a hydrocarbyl group having 1 to 20 carbon atoms and a hydrocarbyl group having 1 to 20 carbon atoms substituted with halogen, and
m is an integer of 2 or more,
[L-H]+[W(J) 4 ] − or [L] + [W(J) 4 ] −   [Chemical Formula 3]

wherein, L is a neutral or cationic Lewis base,
W is a Group 13 element, J is each independently a hydrocarbyl group having 1 to 20 carbon atoms; a hydrocarbyloxy group having 1 to 20 carbon atoms; and substituents in which at least one hydrogen atom of the above substituent groups is substituted with at least one substituent selected from halogen, a hydrocarbyloxy group having 1 to 20 carbon atoms and a hydrocarbyl(oxy)silyl group having 1 to 20 carbon atoms.

2 . The method for preparing a long fiber-reinforcing olefin polymer according to claim 1 , wherein the supported catalyst is a catalyst in which a cocatalyst of Chemical Formula 2, a transition metal compound of Chemical Formula 1, a cocatalyst of Chemical Formula 3 are sequentially supported on a carrier.

3 . The method for preparing a long fiber-reinforcing olefin polymer according to claim 1 , wherein a catalyst including a transition metal compound in which R 3 and R 4 in Chemical Formula 1 are each independently one of a linear alkyl having 1 to 3 carbon atoms is used.

4 . The method for preparing a long fiber-reinforcing olefin polymer according to claim 1 , wherein a catalyst including a transition metal compound in which R 5 and R 6 in Chemical Formula 1 are each independently one of a branched alkyl having 3 to 6 carbon atoms.

5 . The method for preparing a long fiber-reinforcing olefin polymer according to claim 1 , wherein a catalyst including a transition metal compound in which R 1 in Chemical Formula 1 is one of a branched chain alkyl having 3 to 6 carbon atoms and n is an integer between 3 and 9 is used.

6 . The method for preparing a long fiber-reinforcing olefin polymer according to claim 1 , wherein a catalyst including a transition metal compound in which R 2 in Chemical Formula 1 is one of a linear alkyl having 1 to 3 carbon atoms is used.

7 . The method for preparing a long fiber-reinforcing olefin polymer according to claim 1 , wherein a catalyst in which M in Chemical Formula 1 is one of Group 4 transition metals is used.

8 . The method for preparing a long fiber-reinforcing olefin polymer according to claim 1 , wherein silica, alumina, magnesia, or a mixture thereof is used as the carrier.

9 . The method for preparing a long fiber-reinforcing olefin polymer according to claim 1 , wherein the olefin monomer includes at least one selected from the group consisting of ethylene, propylene, 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, 1-heptene, 1-octene, 1-decene, 1-undecene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-eicocene, norbornene, norbornadiene, ethylidenenorbornene, phenylnorbornene, vinylnorbornene, dicyclopentadiene, 1,4-butadiene, 1,5-pentadiene, 1,6-hexadiene, styrene, alpha-methylstyrene, divinylbenzene, and 3-chloromethylstyrene.

10 . The method for preparing a long fiber-reinforcing olefin polymer according to claim 1 , wherein the olefin monomer is propylene.

11 . The method for preparing a long fiber-reinforcing olefin polymer according to claim 1 , wherein an olefin polymer having a weight average molecular weight of 100,000 to 500,000 g/mol is provided.

12 . The method for preparing a long fiber-reinforcing olefin polymer according to claim 1 , wherein an olefin polymer having a degree of stereoregularity of 95% by weight or more is provided.

13 . A long fiber comprising the olefin monomer prepared according to the preparation method of claim 1 .

14 . The long fiber according to claim 13 , further comprising at least one reinforced fiber selected from the group consisting of an organic fiber, a natural fiber, a regenerated fiber, a semi-synthetic fiber, a synthetic fiber, a pitch-based carbon fiber, an aramid fiber and a boron fiber.

15 . The long fiber according to claim 14 , wherein the reinforced fiber is contained in an amount of 5 to 50 parts by weight based on 100 parts by weight of the olefin polymer.

16 . The long fiber according to claim 13 , wherein it has a tensile strength of 975 to 1,000 kgf/cm 2 .

17 . The long fiber according to claim 13 , wherein it has a flexural strength of 1.320 to 1,400 kgf/cm 2 .

18 . The long fiber according to claim 13 , wherein it has an impact strength of 28.0 to 30 kgf/cm 2 .

Assignees

• Lg Chemical Ltd

Inventors

• Noh Kyung Seop
• Lee Ki Soo
• Jeon Sang Jin
• An Sang Eun
• Choi Ji Ho
• Cheong Jae Youp
• Park Hee Kwang
• Lee Sang Hoon

Classifications

• C08K7/06

  Elements · CPC title

• C08F4/65916

  supported on a carrier, e.g. silica, MgCl2, polymer · CPC title

• C08J5/04

  Reinforcing macromolecular compounds with loose or coherent fibrous material · CPC title

• C08J5/046

  with synthetic macromolecular fibrous material · CPC title

• C08F10/06 Primary

  Propene · CPC title